Air exhaust for vapor-heating systems



A P cnossv AIR EXHAUST FOR VAPOR HEATING SYSTEMS.

APPLICATION FILED JAN. 24, 1921'.

Patenteq Aug. 8, 1922. I

UNlTE STTES ARTHUR r. oRosBY, or MINNEAPOLIS, nrrnnnsorn, essrsnos or one-HALF r WILLIAM r. PRICE, on rarnnnarorrs, MINNESOTA.

AIR EXHAUST FOB.- VAPOR-HEATING SYSTEMS.

Application filed January 24, 1921.

T 0' all whom it may concern:

Be it known that I, ARTHUR P Cnosnr., a citizen of the United States, residing in Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and useful Air Exhaust for Vapor-Heating Systems, of which the following is a specification.

- and allowing vapor or steamto short cir cuit'or rush back to the boiler through any radiator in a heating system,- thereby causing a vaporheating system to operate more effectively and-the radiators thereof to maintain a constant and even temperature.

In the drawing, Fig. 1 is a vertical cen tral section through my improved return seal and Fig. 2 is a side elevation of a radi ator and one of my improved return seals attached thereto. My return seal A is adapted to automatically suck or draw air from a radiator and comprises a receptacle having a casing 5, ill its upper portion of which is threaded a removable cover 6 and at the lower portion of which is an internally threaded nipple 7 said nipple being connected with the return pipe 3. The upper end of the casing has an externally threaded nipple 8, whlch is connected by the coupling 9 with the lower outlet end of the radiator, such as B. Entering the nipple 7 is a small vertical passage 10, which extends upwardly through an inverted U shaped duct, seal or siphon D, the short leg 12 of which is reversed upwardly at its lower end 13 and terminates in a valve seat 14 a short distance above the bottom of the receptacle. A partition 15 is thus established between the long and short legs of what might be termed a siphomc discharge. In the arch of the duct, above the partition 15, is a small vent l6 communicating with the passage leading into the radiator, said vent lying normally above the level of the liquid in the duct or seal. The valve seat 14 is adapted to be closed by a small ball float valve 17 which plays freely in the space between the sides of the Casing Specification of Letters Patent.

Patented Aug. 8, 1922.

Serial No. 439,420.

When vapor or steam is first admitted to a cold radiator, there will be a much greater accumulation of water of condensation and also a larger volume of air to dispose of than when the radiator becomes heated. This water of condensation is in suflicient volume to fill the trap or receptacle, lift the valve 17 into open position. overflow the wall or dam 15 and fill the arch above said wall sufficiently to start siphonic action. As soon as this action is'established, the air will be drawn out of the radiator and the vapor be allowed to fill all of its sections. Should the out-rush of water of condensation'nearly exhaust or break the siphon column of water, the ball valve will lower with the water in the casing and close over the valve seat '14, thus checking this tendency and maintaining the water seal produced by the siphon. The's'iphonic discharge is maintainedv so long as condensation continues and until substantially all of the air is withthe dam 15, but the seal is never completely broken, due to the ball valve checking the egress of liquid from the siphon. This action is repeated automatically whenever the walls of the radiator become reduced in temperature. The port 16, in connection with the siphonic action, has a pumping effect on the radiator and automatically prevents the accumulation of air therein and the nonheating of the radiator sections. The vapor and air it will be noted. are separated through the accumulation of water of condensation and the air removing means he comes effective only when the water is in sufficient quantity to prevent or retard the heating of the sections and at this time condensation will be sufficiently rapid to set up siphonic action and remove the air accumulation. During this operation a flapper check valve E prevents the return flow of any water or vapor into and the flooding of the radiator, due to any causesuch as the uneven distribution of ater and vapor throughout the entire heating system and the shutting or turning on of any radiators by the usual valves, such as 19 in the feed pipe 20.. This check valve E is very sensitive and is hingedly hung by the pintle 21 in a "bushing 22, which is fitted closely in the ingress duct 20 in nipple 8.

In case the radiator is shut off by the valve 1-9, the water in the seal prevented from freezing by the second vent passage 24: in the lower end of the long leg of the siphonor seal, said vent allowing nearly all of the Water in the receptacle to flow back to the vapor generator through the return pipe 8.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A return seal for a vapor system, :comprising, a casing having ports in communication with a radiator and with a return pipe, a siphon mounted in said casing and communicating with said return pipe and having a restrictedpassage in the upper wall of the arch of the siphon above the level of the liquid when siphonic action begins and through which passage air is sucked from the radiator intermittently to break the si phon, a. check valve in the radiator port adapted to automatically check flowinto the radiator and a check valve in the lower end of the short leg of the siphon adapted to prevent the liquid in the siphon from entirely exhausting.

.2. Areturn seal for a vapor system, comprising acasing having ports in communicationwith a radiator and with a return pipe, a siphon mounted in said casing and communicating with said return pipe and having a restricted passage above the normal level of the Water when siphonic action begins and communicating with said return pipe, said siphonhaving a second restricted passage communicating with said return pipe and locatednear the bottomof said casing, a check valve in the radiator port adapted to automatically check return flow into they-radiator and a check valve in the lower end of the short leg of the siphon adapted to prevent the'liquid in theiisiphon from entirely exhausting.

8. Anair exhaust for vaponorsteamzheatlllg' systems, comprising :a trap having'a siphonic discharge and .a port for communication with a heat radiating means and a restricted passage in communication with the arch of the siphon and above the normal level of the liquid when siphonic action begins, the water of condensation insaidtrap normally forming a seal for paid :heat-radiating means and the accumulation :of an abnormal volume of condensation in said trap, as when said means is cold, setting up siphonic action intermittently, to suck the air from said radiating :means throughlsaid passage, the excess water in said trap -,co-

ARTHUR r. Caesar. 

